509902241 has 4 divisors (see below), whose sum is σ = 519523092. Its totient is φ = 500281392.

The previous prime is 509902207. The next prime is 509902243. The reversal of 509902241 is 142209905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142209905 = 5 ⋅28441981.

It can be written as a sum of positive squares in 2 ways, for example, as 450288400 + 59613841 = 21220^2 + 7721^2 .

It is a cyclic number.

It is not a de Polignac number, because 509902241 - 2⁶ = 509902177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 509902198 and 509902207.

It is not an unprimeable number, because it can be changed into a prime (509902243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4810346 + ... + 4810451.

It is an arithmetic number, because the mean of its divisors is an integer number (129880773).

Almost surely, 2^509902241 is an apocalyptic number.

It is an amenable number.

509902241 is a deficient number, since it is larger than the sum of its proper divisors (9620851).

509902241 is an equidigital number, since it uses as much as digits as its factorization.

509902241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9620850.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 509902241 is about 22581.0150569012. The cubic root of 509902241 is about 798.9059216102.

The spelling of 509902241 in words is "five hundred nine million, nine hundred two thousand, two hundred forty-one".